[RFC PATCH v2 0/4] Use ACPI PCI hot-plug for q35

[Julia Suvorova]

PCIe native hot-plug has numerous problems with racing events and unpredictable
guest behaviour (Windows). Switching to ACPI hot-plug for now.

Tested on RHEL 8 and Windows 2019.
pxb-pcie is not yet supported.

v2:
    * new ioport range for acpiphp [Gerd]
    * drop find_pci_host() [Igor]
    * explain magic numbers in _OSC [Igor]
    * drop build_q35_pci_hotplug() wrapper [Igor]

Julia Suvorova (4):
  hw/acpi/ich9: Trace ich9_gpe_readb()/writeb()
  hw/i386/acpi-build: Add ACPI PCI hot-plug methods to q35
  hw/i386/acpi-build: Turn off support of PCIe native hot-plug and SHPC
    in _OSC
  hw/acpi/ich9: Enable ACPI PCI hot-plug

 hw/i386/acpi-build.h    | 12 ++++++++++
 include/hw/acpi/ich9.h  |  3 +++
 include/hw/acpi/pcihp.h |  3 ++-
 hw/acpi/ich9.c          | 52 ++++++++++++++++++++++++++++++++++++++++-
 hw/acpi/pcihp.c         | 15 ++++++++----
 hw/acpi/piix4.c         |  2 +-
 hw/i386/acpi-build.c    | 48 +++++++++++++++++++++++--------------
 hw/i386/pc.c            |  1 +
 hw/acpi/trace-events    |  4 ++++
 9 files changed, 114 insertions(+), 26 deletions(-)

-- 
2.25.4